UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

'LIVEWIRE?' · 10th Feb 2019, 2:27 pm

Most Blaupunkt Car Stereos used a 4-digit code, which was entered by counting in the individual digits -i.e., if the code is 3768, pre-set button 1 is pressed repeatedly until '3' is displayed, button 2 until 7 is displayed, and so on. What I can't remember is whether the sequence as you press ech button goes '0.1.2.3.etc., or 1, 2, 3, etc. - not much help when the display isn't working, I know. There was also, on most models, a limit to the number of incorrect attempted entries before the system locked out permanently. In addition, some models required a 5th. button to be pressed to activate the radio once the correct code was entered, and some automatically unlocked without the need to do this. If I can find the Memphis SQR88 service manual, I'll be able to give a definite answer to this question, but it seems like the display has failed and this, because of the age of the set, will be irreplaceable.

10th Feb 2019, 2:27 pm	#11
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Blaupunkt Memphis SQR 88 Car Stereo. Most Blaupunkt Car Stereos used a 4-digit code, which was entered by counting in the individual digits -i.e., if the code is 3768, pre-set button 1 is pressed repeatedly until '3' is displayed, button 2 until 7 is displayed, and so on. What I can't remember is whether the sequence as you press ech button goes '0.1.2.3.etc., or 1, 2, 3, etc. - not much help when the display isn't working, I know. There was also, on most models, a limit to the number of incorrect attempted entries before the system locked out permanently. In addition, some models required a 5th. button to be pressed to activate the radio once the correct code was entered, and some automatically unlocked without the need to do this. If I can find the Memphis SQR88 service manual, I'll be able to give a definite answer to this question, but it seems like the display has failed and this, because of the age of the set, will be irreplaceable.